We stock AISI 4140 steel in squares, flats and hexagons. Call or Email Us for a Free Quote. All material is provided in a cold finished & annealed condition. We offer an extensive inventory of hard-to-find sizes and lengths including (10/12 Ft Random Lengths, 20/24 Ft Random Lengths and Custom Cut-To-Length options). We carry the largest selection of Alloy 4140 bar stock in North America in one location. Alloy 4140 is widely used for general purpose machine applications.

Typical Mechanical PropertiesAvailable Lengths
Brinnell Hardness – 180/235BHN
Tensile Strength – 114,000 PSI
Yield Strength – 100,500 PSI
10/13 Ft R/L
20/26 Ft R/L
Custom Cut-To-Lengths

SQUARES (INCHES) For Metric Size 4140 Cold Finish Annealed Click Here

3/8 7/8 1-1/4 2 3-1/2
1/2 15/16 1-3/8 2-1/4 4
5/8 1 1-1/2 2-1/2
3/4 1-1/8 1-3/4 3

FLATS (INCHES)

1/4 x 1 1/2 x 3 1 x 1-1/2 1-1/4 x 4
1/4 x 1-1/2 1/2 x 3-1/2 1 x 1-3/4 1-1/4 x 5
1/4 x 2 1/2 x 4 1 x 2 1-1/2 x 2
1/4 x 2-1/2 1/2 x 5 1 x 2-1/2 1-1/2 x 2-1/2
1/4 x 3 1/2 x 6 1 x 3 1-1/2 x 3
3/8 x 1 5/8 x 2 1 x 3-1/2 1-1/2 x 3-1/2
3/8 x 1-1/2 5/8 x 3 1 x 4 1-1/2 x 4
3/8 x 2 3/4 x 1 1 x 5 1-1/2 x 5
3/8 x 2-1/2 3/4 x 1-1/2 1 x 6 1-1/2 x 6
3/8 x 3 3/4 x 2 1 x 7 2 x 3
3/8 x 4 3/4 x 2-1/2 1 x 8 2 x 4
3/8 x 6 3/4 x 3 1-1/4 x 1-1/2 2 x 5
1/2 x 3/4 3/4 x 3-1/2 1-1/4 x 2 2 x 6
1/2 x 1 3/4 x 4 1-1/4 x 2-1/4
1/2 x 1-1/2 3/4 x 6 1-1/4 x 2-1/2
1/2 x 2 3/4 x 7 1-1/4 x 3
1/2 x 2-1/2 1 x 1-1/4 1-1/4 x 3-1/2

Hexagons (INCHES)

3/16 1/2 7/8 1-7/16 2-1/4 3-1/4
7/32 9/16 15/16 1-1/2 2-3/8 3-1/2
1/4 5/8 1 1-5/8 2-1/2 4
5/16 11/16 1-1/8 1-3/4 2-5/8
3/8 3/4 1-1/4 1-7/8 2-3/4
7/16 13/16 1-3/8 2 3

Request Quote or Call 800-321-8500

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Phone: 800.321.8500